I use the iOS Notes app to store templated email messages so that I can quickly respond to common enquiries that I receive for my business. This works quite well for me. (I keep them all in a group called “Copy Desk” so that I can find them easily.)
However, Notes doesn’t have an obvious way to select all the text in a note and copy it to the clipboard so that it can be pasted into a reply. In most iOS apps, when you select a bit of text, the pop-up menu that appears includes a Select All command. But, as you can see below, Notes does not.
But there is a way to copy an entire note to the clipboard, it’s just a bit hidden:
Tap the More button (a circle with three dots, in the upper-right corner of the note).
Tap “Send a Copy.”
Then switch to Mail and paste into the body of your message.
Alternatively, if you’re creating a new mail message and not replying to an existing one, tap Mail in step 3.